In the galaxy year 2520, under the war between Earth federation and the Seiren Federation, Nab, a son of immigrants from the earth happens to find the computer room of the wrecked battleship. When he notices that such computer room can be operated, there appear the letters "YAMATO" on the monitor inside the room. As he manages to obtain the disc which can give full access to all the confidential data of the battleship, the grand plan to construct the legendary space battleship YAMATO begins. The journey that can even change the galaxy`s fate.